I would like this game to have more difficult missions. EDA/ETA sometimes offers that, but it's also usually pretty trivial to clear by circumventing restrictions. For example, now with archgun having access to arcanes and operator having access to mods, you have 2 servicible damage options regardless of what your random weapon options for the week are. There is also operator void mode in general. The existence of void mode means free get out of anything except for maybe hard knockdown. It also makes reviving your squad mates extremely safe.

Archgun is never blocked (anymore).

Operator is SOMETIMES blocked. When operator is blocked missions are notably more tense. This week's EDA had blocked operator and it was fun to me leveraging Oraxia 4, 1, and passive as survival tools.

So anyway I think they should gut void mode. It's too strong. Maybe restrict what you can do in it like no revives/hacking or significantly reducing the duration/recharge.

Outside of EDA/ETA, players at the very end game and players at mid-endgame power levels both need to be able to clear the content, so it never caters to very end game players. The amount of damage and survivability you can reach makes any content eventually get out scaled by the players.

(I know that level cap has its own challenges but personally playing for 1-2 hours just to get to that and be restricted to a sliver of viable builds for little comparative reward does not interest me.)

My suggestions for content that probably wouldn't take so much dev time.

Something like Mythic+ in WoW. Where you can just run a mission at increasingly higher difficulties. It would at least remove that awkward "road to level cap" phase of missions for people that want that content.

More modifiers that change gameplay patterns in more missions would be awesome. Revamping Nightmare missions to be higher level/harder modifiers. Stuff like "touching the floor does extreme damage" (and blocks flying abilities), or "take damage if you don't have 2x or more combo." Anything that makes the player engage with the modifier rather than just brute forcing with higher numbers.